The winners of the fourth annual Zoological Society of London (ZSL)’s wildlife photography competition have been announced. Adult winner in the Weird and Wonderful category – ‘Bright Eyes’ by Carolyn Collins shows a green tree frog with bright blue eyes.

The Judges Choice and winner of the Size Matters category – ‘Timeless’ was captured by photographer Andy Skillen who saw the lone grizzly bear patrolling the beaches of the Greater Lake Clark National Park area with Alaska’s mountains providing an iconic backdrop.

Adult winner of The Birds and the Bees category – ‘A present for my love’ by John Gooday shows a male European Bee-eater presenting a female with a food gift of a dragonfly as part of a courtship ritual.

Pumas are among the least seen of earth’s big cats. Though they’re widely distributed from the Canadian Rockies to the southernmost Andes (and known alternatively as cougars or mountain lions), pumas have historically been thought of as too elusive for any sort of commercial tourism.

That changed when a company called Quasar Expeditions, in partnership with Explora Patagonia, launched its first puma trekking safaris earlier this year in Chile’s famed Torres Del Paine National Park.

The idea was to give wildlife enthusiasts the same opportunity to see pumas as they’d have with jaguars in Brazil, lions in Africa or tigers in India.